Abstract: An image forming apparatus in which a first toner image to be transferred to a recording medium through secondary transfer is formed on an intermediate transfer member and a second toner image not to be transferred to the recording medium through secondary transfer is formed on the intermediate transfer member after the first toner image has been formed. When the first toner image and the second toner image are formed, a position on the intermediate transfer member at which the second toner image is formed is controlled in accordance with a conveying direction length of the recording medium, to which the first toner image is transferred through secondary transfer, measured by using a detection unit.

Abstract: An image forming apparatus includes a detachably-mounted cartridge including a developer accommodating portion for accommodating a developer and an operation member, a remaining amount detector for detecting a remaining amount of developer in the developer accommodating portion, an operation amount detector for detecting a cumulative operation amount of the operation member, and a setting device for setting timing of subsequent remaining amount detection of the remaining amount detector. The remaining amount detector provides a remaining amount ratio of the developer remainder to a maximum accommodation capacity of the developer accommodating portion, and the operation amount detector provides an operation amount ratio of a remaining operation amount until the end of the service life from the detection of the cumulative operation amount to a total operation amount until the end of the service life from an initial state of the operation member.

Abstract: An image forming apparatus in which a first toner image to be transferred to a recording medium through secondary transfer is formed on an intermediate transfer member and a second toner image not to be transferred to the recording medium through secondary transfer is formed on the intermediate transfer member after the first toner image has been formed. When the first toner image and the second toner image are formed, a position on the intermediate transfer member at which the second toner image is formed is controlled in accordance with a conveying direction length of the recording medium, to which the first toner image is transferred through secondary transfer, measured by using a detection unit.

Abstract: An image forming apparatus includes a cartridge having a developer container, and an operation member; a remainder detector for detecting the developer remainder in the container when an image forming operation is not carried out while the operation member is in operation; an operation amount detector for detecting a cumulative operation amount of the operation member, wherein an end of life of the cartridge is discriminated when the remainder detector detects that the remaining amount of the developer becomes less than a predetermined amount, and the end is also discriminated when the operation amount detector detects an end of life of operation member; a setting device for setting, on the basis of outputs of the remainder detector and the operation amount detector, timing of subsequent detection of the remainder detector.

Abstract: A value for determining a type of a recording medium is compared with a detection result, and the type of the recording medium is confirmed when there is no detection result within a predetermined range. Thus, by controlling the number of recording media to be detected for confirming the type of the recording medium according to the determination result of the recording media, a drop in productivity during determination of the types of the recording media is reduced.